public class Builder {
    private static String URL = "https://pracwork.ru/";
    private static Retrofit retrofit = null;
    static Retrofit request(){
        OkHttpClient client = new OkHttpClient.Builder().build();
        retrofit = new Retrofit.Builder().baseUrl(URL).addConverterFactory(GsonConverterFactory.create()).client(client).build();
        return retrofit;
    }
}
